View Compilation Error

0_0_15990564_12855\Main.java:1: 错误: 需要';'
import java.util.*
                  ^
0_0_15990564_12855\Main.java:13: 错误: 缺少数组维
                     a0=kb.nextDouble();
                     ^
0_0_15990564_12855\Main.java:13: 错误: 非法的表达式开始
                     a0=kb.nextDouble();
                       ^
0_0_15990564_12855\Main.java:13: 错误: 需要';'
                     a0=kb.nextDouble();
                          ^
4 个错误